molter vs fauna

molter and fauna both are nouns.

Word	Noun	Adjective	Verb	Adverb
molter	Yes	No	No	No
fauna	Yes	No	No	No

As nouns, fauna is a hypernym of molter; that is, fauna is a word with a broader meaning than molter:

molter: an animal (especially birds and arthropods and reptiles) that periodically shed their outer layer (feathers or cuticle or skin or hair)
fauna: a living organism characterized by voluntary movement

Other hypernyms of molter include animal, animate being, beast, brute, creature.

molter (noun)	fauna (noun)
an animal (especially birds and arthropods and reptiles) that periodically shed their outer layer (feathers or cuticle or skin or hair)	a living organism characterized by voluntary movement
	all the animal life in a particular region or period